The JBX05667 4m Arista-Compatible 100GBASE-CR4 QSFP28 Passive Direct Attach Copper Cable represents cutting-edge networking infrastructure technology designed specifically for demanding enterprise and data center environments. This high-speed interconnect solution delivers exceptional performance, reliability, and value for organizations requiring robust 100GB connectivity. **Technical Specifications:** Designed to IEEE 802.3bj standards and QSFP28 Multi-Source Agreement (MSA) specifications, this cable supports full-duplex 100GB Ethernet transmission. The 26AWG twinax copper construction ensures optimal signal integrity and minimal attenuation over the 4-meter distance, while the protective plastic jacketing provides durability in active network environments. **Compatibility & Integration:** As a direct replacement for Arista OEM P/N CAB-Q-Q-100G-4M, this cable integrates seamlessly with Arista switching platforms and other compatible networking equipment. The QSFP28 form factor makes it the industry standard for 100GB applications, ensuring broad compatibility across modern data center infrastructure. **Passive Technology Advantages:** Unlike active cables requiring external power, this passive DAC eliminates power consumption, reduces heat generation, and removes potential failure points. This makes passive DAC cables the preferred choice for cost-conscious deployments where reliability and efficiency are paramount. **Compliance & Certifications:** Fully compliant with RoHS (EU directive 2002/95/EC) and certified by TUV and UL, this cable meets the highest safety and environmental standards. Its qualification to IEEE 802.3bj specifications ensures interoperability and performance consistency. **Use Cases:** Perfect for switch-to-switch connections, server-to-switch uplinks, storage array interconnects, and high-frequency trading environments where low latency and reliability are critical. The 4-meter length accommodates typical rack and cabinet configurations in modern data centers. **Service & Support:** Backed by a 90-day limited warranty and comprehensive technical support. Free standard shipping on orders over $99, with rapid fulfillment from distribution centers in Danville, CA and Beaufort, SC. Custom brand programming available for enterprise deployments.